Greg is the nicest guy. He climbs scaffolding like an acrobat, is high energy, hard-working, and is extremely knowledgeable about solar radiant systems. He really believes in this stuff, and is not just in it to make a fast buck, unlike some other companies I talked to. These systems aren't cheap, but hopefully make up for it in efficiency. His bid was very competitive with other companies and he fixed all issues that came up, going well beyond expectations. He was the most knowledgeable company I talked to. He got my system installed and running quickly, and now I have heat and hot water! Yay! Highly recommend!!